Improve scrolling performance when there are many windowed plugins in a page....

webkit/glue/plugins/webplugin_delegate_impl.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WEBKIT_GLUE_PLUGIN_WEBPLUGIN_DELEGATE_IMPL_H__
 #define WEBKIT_GLUE_PLUGIN_WEBPLUGIN_DELEGATE_IMPL_H__
 
 #include <string>
 #include <list>
 
@@ skipping 26 matching lines @@
 
   // WebPluginDelegate implementation
   virtual void PluginDestroyed();
   virtual bool Initialize(const GURL& url,
                           char** argn,
                           char** argv,
                           int argc,
                           WebPlugin* plugin,
                           bool load_manually);
   virtual void UpdateGeometry(const gfx::Rect& window_rect,
-                              const gfx::Rect& clip_rect,
-                              const std::vector<gfx::Rect>& cutout_rects,
-                              bool visible);
+                              const gfx::Rect& clip_rect);
   virtual void Paint(HDC hdc, const gfx::Rect& rect);
   virtual void Print(HDC hdc);
   virtual void SetFocus();  // only called when windowless
 // only called when windowless
   virtual bool HandleEvent(NPEvent* event, 
                            WebCursor* cursor);
   virtual NPObject* GetPluginScriptableObject();
   virtual void DidFinishLoadWithReason(NPReason reason);
   virtual int GetProcessId();
 
@@ skipping 31 matching lines @@
     PLUGIN_QUIRK_DONT_CALL_WND_PROC_RECURSIVELY = 4,
     PLUGIN_QUIRK_DONT_SET_NULL_WINDOW_HANDLE_ON_DESTROY = 8,
     PLUGIN_QUIRK_DONT_ALLOW_MULTIPLE_INSTANCES = 16,
     PLUGIN_QUIRK_DIE_AFTER_UNLOAD = 32,
     PLUGIN_QUIRK_PATCH_TRACKPOPUP_MENU = 64,
     PLUGIN_QUIRK_PATCH_SETCURSOR = 128,
   };
 
   int quirks() { return quirks_; }
 
-  static void MoveWindow(HWND window,
-                         const gfx::Rect& window_rect,
-                         const gfx::Rect& clip_rect,
-                         const std::vector<gfx::Rect>& cutout_rects,
-                         bool visible);
-
  private:
   WebPluginDelegateImpl(gfx::NativeView containing_view,
                         NPAPI::PluginInstance *instance);
   ~WebPluginDelegateImpl();
 
   //--------------------------
   // used for windowed plugins
   void WindowedUpdateGeometry(const gfx::Rect& window_rect,
-                              const gfx::Rect& clip_rect,
-                              const std::vector<gfx::Rect>& cutout_rects,
-                              bool visible);
+                              const gfx::Rect& clip_rect);
   // Create the native window. 
   // Returns true if the window is created (or already exists).
   // Returns false if unable to create the window.
   bool WindowedCreatePlugin();
 
   // Destroy the native window.
   void WindowedDestroyWindow();
 
   // Reposition the native window to be in sync with the given geometry.
   // Returns true if the native window has moved or been clipped differently.
   bool WindowedReposition(const gfx::Rect& window_rect,
-                          const gfx::Rect& clip_rect,
-                          const std::vector<gfx::Rect>& cutout_rects,
-                          bool visible);
+                          const gfx::Rect& clip_rect);
 
   // Tells the plugin about the current state of the window.
   // See NPAPI NPP_SetWindow for more information.
   void WindowedSetWindow();
 
   // Registers the window class for our window
   ATOM RegisterNativeWindowClass();
 
   // Our WndProc functions.
   static LRESULT CALLBACK DummyWindowProc(
@@ skipping 52 matching lines @@
   uint32 last_message_;
   bool is_calling_wndproc;
 
   HWND parent_;
   NPWindow window_;
   gfx::Rect window_rect_;
   gfx::Rect clip_rect_;
   std::vector<gfx::Rect> cutout_rects_;
   int quirks_;
 
-  // We only move/size the plugin window once after its creation. The
-  // rest of the moves are controlled by the browser. This flag controls
-  // this behaviour.
-  bool initial_plugin_resize_done_;
-
   // Windowless plugins don't have keyboard focus causing issues with the
   // plugin not receiving keyboard events if the plugin enters a modal 
   // loop like TrackPopupMenuEx or MessageBox, etc.
   // This is a basic issue with windows activation and focus arising due to
   // the fact that these windows are created by different threads. Activation
   // and focus are thread specific states, and if the browser has focus,
   // the plugin may not have focus. 
   // To fix a majority of these activation issues we create a dummy visible 
   // child window to which we set focus whenever the windowless plugin 
   // receives a WM_LBUTTONDOWN/WM_RBUTTONDOWN message via NPP_HandleEvent.
@@ skipping 62 matching lines @@
   static iat_patch::IATPatchFunction iat_patch_set_cursor_;
 
   // Holds the current cursor set by the windowless plugin.
   WebCursor current_windowless_cursor_;
 
   DISALLOW_EVIL_CONSTRUCTORS(WebPluginDelegateImpl);
 };
 
 #endif  // #ifndef WEBKIT_GLUE_PLUGIN_WEBPLUGIN_DELEGATE_IMPL_H__